ya... that style hose clamps are prone to leakage... dont reuse them, and those hoses look pretty old and cruddy... so replace them
changing it is relatively easy, go to kragen or where ever and get 3' of 3/4" and 3' of 5/8" heater hose, 4 new hose clamps, and some coolant if you dont have any.
cut one hose in half, drain it down to a bucket or something, repeat for the other hose. then just remove the old hoses, install the new, and refill the coolant system. Should only take an hour to replace